BUG: When in monthly calendar, dashboard button don't work

If in the monthly calendar, the dashboard button and manage orders buttons don't work.
https://imgur.com/a/JMu1rhF

Hi,
To fix the issue, please opening file: root -> administrator -> components -> com_osservicesbooking -> classes -> calendar.html.php
Find:
<form method="POST" action="index.php?option=com_osservicesbooking&task=calendar_employee" name="adminForm" id="ftForm">

and change

<form method="POST" action="index.php?option=com_osservicesbooking&task=calendar_employee" name="adminForm" id="adminForm">

Thanks
Dam